EP0308073A3 - System for detecting stray metal in articles - Google Patents

System for detecting stray metal in articles Download PDF

Info

Publication number
EP0308073A3
EP0308073A3 EP88307615A EP88307615A EP0308073A3 EP 0308073 A3 EP0308073 A3 EP 0308073A3 EP 88307615 A EP88307615 A EP 88307615A EP 88307615 A EP88307615 A EP 88307615A EP 0308073 A3 EP0308073 A3 EP 0308073A3
Authority
EP
European Patent Office
Prior art keywords
articles
detecting stray
stray metal
metal
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88307615A
Other versions
EP0308073A2 (en
EP0308073B1 (en
Inventor
Takashi Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anritsu Corp
Original Assignee
Anritsu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anritsu Corp filed Critical Anritsu Corp
Publication of EP0308073A2 publication Critical patent/EP0308073A2/en
Publication of EP0308073A3 publication Critical patent/EP0308073A3/en
Application granted granted Critical
Publication of EP0308073B1 publication Critical patent/EP0308073B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
    • G01V3/107—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements
EP88307615A 1987-08-25 1988-08-17 System for detecting stray metal in articles Expired - Lifetime EP0308073B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62212407A JPS6454281A (en) 1987-08-25 1987-08-25 Metal detecting apparatus
JP212407/87 1987-08-25

Publications (3)

Publication Number Publication Date
EP0308073A2 EP0308073A2 (en) 1989-03-22
EP0308073A3 true EP0308073A3 (en) 1990-03-07
EP0308073B1 EP0308073B1 (en) 1994-07-13

Family

ID=16622075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307615A Expired - Lifetime EP0308073B1 (en) 1987-08-25 1988-08-17 System for detecting stray metal in articles

Country Status (5)

Country Link
US (1) US4949037A (en)
EP (1) EP0308073B1 (en)
JP (1) JPS6454281A (en)
KR (1) KR900005621B1 (en)
DE (1) DE3850625T2 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230611B (en) * 1989-03-30 1993-02-03 Cintex Ltd Product monitoring
JPH0820523B2 (en) * 1989-03-31 1996-03-04 アンリツ株式会社 Metal detection method
GB8920412D0 (en) * 1989-09-08 1989-10-25 Ca Atomic Energy Ltd Metal detecting system
JP3029657B2 (en) * 1990-09-28 2000-04-04 カヤバ工業株式会社 Position detection device
JP2533409B2 (en) * 1990-11-30 1996-09-11 株式会社小松製作所 Output signal processing device of detection coil
IT1260208B (en) * 1992-11-19 1996-04-02 Giovanni Manneschi PERFECTED METAL DETECTOR
ES2078852B1 (en) * 1993-08-02 1996-07-16 Azkoyen Ind Sa "PROCEDURE AND DEVICE FOR THE HIGH SPEED MEASUREMENT AND CHARACTERIZATION OF MAGNETIC MATERIALS"
US5659247A (en) * 1994-03-10 1997-08-19 Denver Dynamics, Inc. Device for detecting metal objects passing through an opening
US5721489A (en) * 1995-10-06 1998-02-24 Garrett Electronics, Inc. Metal detector method for identifying target size
JPH11295439A (en) * 1998-04-07 1999-10-29 Ishida Co Ltd Foreign matter detection machine and system
US6479993B1 (en) * 1999-06-30 2002-11-12 Ishida Co., Ltd. Method of detecting foreign matter and apparatus therefor
GB0000566D0 (en) * 2000-01-12 2000-03-01 Willett Int Ltd Apparatus and method
DE10011230C9 (en) * 2000-03-08 2006-05-04 Mesutronic Gerätebau GmbH Evaluation device for a metal detector
CN1865952B (en) * 2005-05-18 2010-10-13 上海高晶金属探测设备有限公司 Intelligent storable industrial metal detector
JP4807281B2 (en) * 2006-11-27 2011-11-02 トヨタ自動車株式会社 Hardening pattern inspection method and inspection apparatus
US7893690B2 (en) * 2007-07-19 2011-02-22 Carnes Company, Inc. Balancing circuit for a metal detector
CN101650442B (en) * 2009-09-15 2012-06-13 合肥安大电子检测技术有限公司 Intelligent impurity metal detecting system and detecting method thereof
EP2439560B1 (en) * 2010-10-07 2013-05-29 Mettler-Toledo Safeline Limited Method for monitoring the operation of a metal detection system and metal detection system
US9383439B2 (en) 2013-06-27 2016-07-05 The United States of America as represented by the Federal Bureau of Investigation, Dept. of Justice Detection of conductive material in a thin film

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001198A1 (en) * 1979-10-22 1981-04-30 J Clausin Device allowing the detection in solids,liquids or gases,of the metal particles included,the location thereof and the determination of their size
EP0208214A2 (en) * 1985-07-08 1987-01-14 Goring Kerr plc A metal detector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4325027A (en) * 1979-11-28 1982-04-13 Compass Electronics Metal detector for locating objects with full sensitivity in the presence of distributed mineral material
JPS6078378A (en) * 1983-10-05 1985-05-04 Anritsu Corp Metal detector
US4651094A (en) * 1984-07-16 1987-03-17 John Wallace Accuracy control subsystem
US4677384A (en) * 1985-09-19 1987-06-30 Teknetics, Inc. Target-identifying metal detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001198A1 (en) * 1979-10-22 1981-04-30 J Clausin Device allowing the detection in solids,liquids or gases,of the metal particles included,the location thereof and the determination of their size
EP0208214A2 (en) * 1985-07-08 1987-01-14 Goring Kerr plc A metal detector

Also Published As

Publication number Publication date
US4949037A (en) 1990-08-14
EP0308073A2 (en) 1989-03-22
KR900005621B1 (en) 1990-07-31
DE3850625T2 (en) 1995-01-19
KR890004164A (en) 1989-04-20
EP0308073B1 (en) 1994-07-13
JPS6454281A (en) 1989-03-01
DE3850625D1 (en) 1994-08-18

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